1 /* $NetBSD: delch.c,v 1.15 2001/04/20 12:57:47 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)delch.c 8.2 (Berkeley) 5/4/94"; 40 #else 41 __RCSID("$NetBSD: delch.c,v 1.15 2001/04/20 12:57:47 jdc Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <string.h> 46 47 #include "curses.h" 48 #include "curses_private.h" 49 50 #ifndef _CURSES_USE_MACROS 51 /* 52 * delch -- 53 * Do an delete-char on the line, leaving (cury, curx) unchanged. 54 */ 55 int 56 delch(void) 57 { 58 return wdelch(stdscr); 59 } 60 61 /* 62 * mvdelch -- 63 * Do an delete-char on the line at (y, x) on stdscr. 64 */ 65 int 66 mvdelch(int y, int x) 67 { 68 return mvwdelch(stdscr, y, x); 69 } 70 71 /* 72 * mvwdelch -- 73 * Do an delete-char on the line at (y, x) of the given window. 74 */ 75 int 76 mvwdelch(WINDOW *win, int y, int x) 77 { 78 if (wmove(win, y, x) == ERR) 79 return ERR; 80 81 return wdelch(win); 82 } 83 84 #endif 85 86 /* 87 * wdelch -- 88 * Do an delete-char on the line, leaving (cury, curx) unchanged. 89 */ 90 int 91 wdelch(WINDOW *win) 92 { 93 __LDATA *end, *temp1, *temp2; 94 95 end = &win->lines[win->cury]->line[win->maxx - 1]; 96 temp1 = &win->lines[win->cury]->line[win->curx]; 97 temp2 = temp1 + 1; 98 while (temp1 < end) { 99 (void) memcpy(temp1, temp2, sizeof(__LDATA)); 100 temp1++, temp2++; 101 } 102 temp1->ch = ' '; 103 temp1->bch = win->bch; 104 temp1->attr = 0; 105 temp1->battr = win->battr; 106 __touchline(win, (int) win->cury, (int) win->curx, (int) win->maxx - 1); 107 return (OK); 108 } 109